Brith control help ‼️⁉️‼️⁉️

Ashlee • Hi everyone I'm a first time mom expecting a baby boy in about 4 weeks give or take.
Okay so tomorrow Monday I got at 11am for my 6weeks pp checkup. And I have no clue what kind of birth control to go on. I don't know if I want the one that goes in my arm or and iud or the pill. I need help!! I'm a first time mom and a single parent to this handsome boy right here 
 and right now I don't need another baby. I have never been on brith control in my 21 years of life so please everyone help me out give me some advice please thanks so so much.